Tweak your lifestyle

It's a familiar story: You pledge to honor a daily elliptical routine and count every last calorie. But soon, you're eating cupcakes at the office and grabbing happy hour mojitos, thinking, Oops, diet over.

There is a better way: Swap the all-or-nothing approach for one or two healthy switch-ups in your daily routine. "Doing this can lead to more weight loss than you ever imagined," says Marissa Lippert, RD, author of The Cheater's Diet.

In fact, we talked to readers who knocked off 10, 25, even 60 pounds with some easy tweaks. Borrow their slim-down secrets to transform your body the real-world way.